I'm not entirely sure which forum this belongs in really, but this seems a good enough start point whilst I wait for Adobe to get back to me. We have a CS3 license that was purchased on a volume ...

Serial number rejection (cont.) We continue to report on an issue where some users are unable to properly use their Photoshop CS2 serial numbers to remove the 2-day expiration of the Photoshop CS3 ...

[Remember that if you think you are having a serial number rejection issue, make sure that you are using the serial number generated from your Photoshop CS2 number by ...